JPH0689673A - Cathode-ray tube device - Google Patents
Cathode-ray tube deviceInfo
- Publication number
- JPH0689673A JPH0689673A JP4240416A JP24041692A JPH0689673A JP H0689673 A JPH0689673 A JP H0689673A JP 4240416 A JP4240416 A JP 4240416A JP 24041692 A JP24041692 A JP 24041692A JP H0689673 A JPH0689673 A JP H0689673A
- Authority
- JP
- Japan
- Prior art keywords
- conductive film
- electric field
- funnel
- deflection yoke
- ray tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
- H01J29/76—Deflecting by magnetic fields only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/003—Arrangements for eliminating unwanted electromagnetic effects, e.g. demagnetisation arrangements, shielding coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/0007—Elimination of unwanted or stray electromagnetic effects
- H01J2229/0015—Preventing or cancelling fields leaving the enclosure
- H01J2229/0023—Passive means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は陰極線管装置に関し、
特にその偏向ヨークから放射される交番電界を遮蔽する
ことに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube device,
Particularly, it relates to shielding an alternating electric field radiated from the deflection yoke.
【０００２】[0002]
【従来の技術】図８乃至図１０を参照して従来の陰極線
管装置を説明する。図９は従来の陰極線管の本体図であ
る。図において、ファンネル１はネック部１ａ、コーン
部１ｂ、高圧アノードボタン１ｄを有するファンネル本
体部１ｃより構成される。ネック部１ａとコーン部１ｂ
とのつなぎ目はネックシールライン１ｅと呼ばれる。フ
ァンネル１の前方にはフェースパネル２がフリット接合
されている。以上のようにしてガラスバルブ２０が構成
されている。また上記ネック部１ａには電子銃３が封止
されている。上記フェースパネル２の外周側面には防爆
特性を保証するための防爆バンド４が巻きつけられ、そ
の四隅にはガラスバルブ２０を図示しないシャーシに懸
架するための取付け耳部４ａが設けられている。さらに
上記ファンネル本体部１ｃに設けられた高圧アノードボ
タン１ｄの周囲には絶縁のためのシリコン樹脂膜５が形
成される。また、ファンネル本体部１ｃの外側面には、
静電容量付加用導電膜６が設けられている。この導電膜
６は通常、黒鉛を塗布することによって形成されてい
る。尚、２８はネック部１ａに平行な直線であり、陰極
線管の管軸を示す。2. Description of the Related Art A conventional cathode ray tube device will be described with reference to FIGS. FIG. 9 is a main body view of a conventional cathode ray tube. In the figure, the funnel 1 is composed of a neck portion 1a, a cone portion 1b, and a funnel body portion 1c having a high-pressure anode button 1d. Neck 1a and cone 1b
The joint with is called a neck seal line 1e. A face panel 2 is frit-bonded to the front of the funnel 1. The glass bulb 20 is configured as described above. An electron gun 3 is sealed in the neck portion 1a. Explosion-proof bands 4 for ensuring explosion-proof characteristics are wound around the outer peripheral side surface of the face panel 2, and mounting ears 4a for suspending the glass bulb 20 on a chassis (not shown) are provided at four corners. Further, a silicon resin film 5 for insulation is formed around the high voltage anode button 1d provided on the funnel body 1c. Also, on the outer surface of the funnel body 1c,
A conductive film 6 for adding capacitance is provided. The conductive film 6 is usually formed by applying graphite. In addition, 28 is a straight line parallel to the neck portion 1a and indicates the tube axis of the cathode ray tube.
【０００３】以上のようにして構成された陰極線管に
は、図８に示すように、電子ビームを偏向するための偏
向ヨーク７がコーン部１ｂとネック部１ａとの間の位置
に取り付けられている。そしてこの偏向ヨーク７は図１
０に示すように、水平偏向コイル７ａ、垂直偏向コイル
７ｂ、偏向ヨーク本体部７ｃの部材によって構成されて
いる。As shown in FIG. 8, a deflection yoke 7 for deflecting an electron beam is attached to the cathode ray tube constructed as described above at a position between the cone portion 1b and the neck portion 1a. There is. The deflection yoke 7 is shown in FIG.
As shown in 0, the horizontal deflection coil 7a, the vertical deflection coil 7b, and the deflection yoke main body portion 7c are configured.
【０００４】次に動作について説明する。ネック部１ａ
に封止された電子銃３から電子ビームが出射されると、
該出射された電子ビームは偏向ヨーク７の水平偏向コイ
ル７ａ、垂直偏向コイル７ｂにより水平・垂直方向に所
定量偏向されてフェースパネル２の内側面に形成された
蛍光体膜上を走査して所望の画像を映出する。Next, the operation will be described. Neck 1a
When an electron beam is emitted from the electron gun 3 sealed in
The emitted electron beam is deflected by a predetermined amount in the horizontal and vertical directions by the horizontal deflection coil 7a and the vertical deflection coil 7b of the deflection yoke 7, and scans on the phosphor film formed on the inner surface of the face panel 2 to obtain the desired electron beam. The image of.
【０００５】また、図１１には別の従来例を示す。この
陰極線管のフェースパネル２の外表面には透明導電膜２
１が設けられている。この導電膜２１は導通テープ１８
により防爆バンド４へ更に静電容量付加用導電膜６へ接
続される。静電容量付加用導電膜６はアース線２９を通
じて接地されているので、導電膜２１の電位も零ボルト
である。かかる導電膜２１はフェースパネル２の表面上
の帯電を防止するため、反射等の防幻のため、および偏
向ヨーク７から前方へ放射される電波を低減するために
設けられる（実開昭６１−１０１９５０号、特開平３−
１３１１８０号）。FIG. 11 shows another conventional example. The transparent conductive film 2 is formed on the outer surface of the face panel 2 of the cathode ray tube.
1 is provided. This conductive film 21 is a conductive tape 18
Thus, the explosion-proof band 4 is further connected to the conductive film 6 for adding capacitance. Since the capacitance adding conductive film 6 is grounded through the ground wire 29, the potential of the conductive film 21 is also 0 volt. The conductive film 21 is provided to prevent the surface of the face panel 2 from being charged, to prevent reflections and the like, and to reduce the electric waves radiated forward from the deflection yoke 7 (actually, 61- 101950, JP-A-3-
131180).
【０００６】[0006]
【発明が解決しようとする課題】さて、偏向ヨークは電
子ビームが陰極線管のフェースパネルの内表面を走査す
るように交番磁界を生ぜしめるのであるがそれと同時に
交番電界を放射するのである。近年、電磁波が人体に悪
影響を及ぼすことが問題視されており、ディスプレイモ
ニタに関しても、主として偏向ヨークから発せられる交
番電界による人体への影響が懸念されている。こうした
観点から、１９９１年にスウェーデン国立計量・試験評
議会（ＭＰＲ）やスウェーデン中央労働評議会（ＴＣ
Ｏ）等ではディスプレイモニタから発せられる電磁波に
関する規格を提案している。これらの規格は表１に示す
とおりである。 The deflection yoke produces an alternating magnetic field so that the electron beam scans the inner surface of the face panel of the cathode ray tube, but at the same time it emits an alternating electric field. In recent years, it has been regarded as a problem that electromagnetic waves have an adverse effect on the human body, and it is feared that an alternating electric field mainly generated from the deflection yoke may affect the human body even in a display monitor. From this perspective, in 1991 the Swedish National Metrology and Testing Council (MPR) and the Swedish Central Labor Council (TC)
O) et al. Have proposed standards for electromagnetic waves emitted from display monitors. These standards are as shown in Table 1.
【０００７】この発明が解決しようとする課題として
は、従来の陰極線管装置は、偏向ヨークを中心に放射状
に発生する交番電界を十分にシールドする措置が取られ
ておらず、ＣＲＴ前面での交番電界［ＶＬＦ帯域］は表
２に示すとおりであり、発明者自身の測定によれば、こ
れらの交番電界［ＶＬＦ帯域］は水平周波数に依存して
おり、水平周波数が上がれば、交番電界［ＶＬＦ帯域］
も増すことが認められており、ＣＲＴのファンネル部及
び、フェースパネル部を抜け出て、観視者に悪影響を与
えるとされる交番電界が放射されるといった問題点があ
った。この発明は、特に対策が困難である２ｋＨｚ〜４
００ｋＨｚ（以下ＶＬＦ帯域と称す）での交番電界を低
減したＣＲＴを得ることを目的とする。表 ２（ＣＲＴ：１６インチ） 帯電防止処理型：フェース・プレート上に、２．６×１
０9 Ωのコーティング処理 As a problem to be solved by the present invention, the conventional cathode ray tube device does not take measures to sufficiently shield the alternating electric field radially generated around the deflection yoke, and the alternating current in front of the CRT is not taken. The electric field [VLF band] is as shown in Table 2. According to the measurement by the inventor, the alternating electric field [VLF band] depends on the horizontal frequency, and if the horizontal frequency increases, the alternating electric field [VLF band]. Band]
It is also recognized that the number increases, and there is a problem that an alternating electric field which is considered to adversely affect the viewer is radiated through the funnel portion and the face panel portion of the CRT. The present invention is particularly difficult to take measures from 2 kHz to 4 kHz.
The purpose is to obtain a CRT with a reduced alternating electric field at 00 kHz (hereinafter referred to as VLF band). Table 2 (CRT: 16 inches) Antistatic treatment type: 2.6 x 1 on face plate
09 Ω coating treatment
【０００８】[0008]
【課題を解決するための手段】本発明の第一の解決手段
はファンネル部の偏向ヨークが装着されるコーン部から
ネック部にかけての所定領域に、電界シールド用導電膜
を設け、偏向ヨークのコイルに対して前記導電膜を電気
絶縁するために偏向ヨークと導電膜との隙間に自然硬化
樹脂を充填する。本発明の第二の解決手段はフェースパ
ネルの外表面に設けられた電界シールド用透明導電膜に
所望の電位を付与する。本発明の第三の解決手段はファ
ンネル部の偏向ヨークが装着されるコーン部からネック
部にかけての所定領域に、電界シールド用導電膜を設
け、更にフェースパネルの外表面に電界シールド用透明
導電膜を設ける。A first solution of the present invention is to provide a conductive film for electric field shield in a predetermined region from a cone portion where a deflection yoke of a funnel portion is mounted to a neck portion, and to form a coil of the deflection yoke. On the other hand, in order to electrically insulate the conductive film, a natural curing resin is filled in the gap between the deflection yoke and the conductive film. The second solution of the present invention applies a desired potential to the transparent conductive film for electric field shield provided on the outer surface of the face panel. A third solution of the present invention is to provide a conductive film for electric field shielding in a predetermined region from a cone portion where a deflection yoke of a funnel portion is mounted to a neck portion, and further provide a transparent conductive film for electric field shielding on an outer surface of a face panel. To provide.
【０００９】[0009]
【作用】本発明の第一の解決手段により、偏向ヨークか
ら放射状に発出されて管軸方向にほぼ平行に前方へ進行
する交番電界はファンネル部に設けた電界シールド用導
電膜で発散する間もなく遮蔽される。本発明の第二の解
決手段により、偏向ヨークから発出されてフェースパネ
ルに達した交番電界はこれを最適に遮蔽するように選択
された電位にある電界シールド用導電膜により良好に遮
蔽される。本発明の第三の解決手段により、偏向ヨーク
から発出されて前方へ進行しようとする交番電界は二重
の電界シールド作用を受けて十分に遮蔽される。According to the first solution of the present invention, the alternating electric field radially emitted from the deflection yoke and traveling forward substantially parallel to the tube axis direction is shielded immediately by the electric field shielding conductive film provided in the funnel portion. To be done. According to the second solution of the present invention, the alternating electric field emitted from the deflection yoke and reaching the face panel is satisfactorily shielded by the electric field shielding conductive film at a potential selected to optimally shield the alternating electric field. According to the third solution of the present invention, the alternating electric field emitted from the deflection yoke and trying to travel forward is sufficiently shielded by the double electric field shielding action.
【００１０】[0010]
【実施例】以下、この発明の実施例を図について説明す
る。図１は本発明の第一解決手段の実施例を示す。図に
おいて、１はファンネル、１ａはネック部、１ｂはコー
ン部、１ｃはファンネル本体部、１ｄは高圧アノードボ
タン、２はフェースパネル、３は電子銃、４は防爆バン
ド、４ａは取付け耳部、５はシリコン樹脂膜、６は静電
容量付加用導電膜、７は偏向ヨーク、２８は管軸線であ
る。これらは図８に示す従来の陰極線管装置のものと同
じである。１７は電界シールド用導電膜である。この導
電膜１７はコーン部１ｂからネック部１ａの外側面に黒
鉛を塗布して設けられ、偏向ヨーク７の開口部を覆う所
定区域に形成されている。この導電膜１７は、静電容量
付加用導電膜６につながっており、アース線２９によっ
て防爆バンド４を介して接地されて、電界シールド面を
形成する。かかる導電膜１７と偏向ヨーク７との隙間に
は電気絶縁のために自然硬化樹脂３０が充填されてい
る。次に動作について説明する。このようにして構成さ
れた陰極線管において、防爆バンド４をアースすること
によって、導電膜１７はＯＶの等電位面となり、偏向ヨ
ーク７から前方へ進行する交番電界に対して電界シール
ド効果を持つ。かくして、偏向ヨーク７から発する交番
電界は導電膜１７によって減衰される。また偏向ヨーク
７の水平偏向コイル７ａと導電膜１７との間には自然硬
化樹脂が充填されているので、水平偏向コイル７ａと導
電膜１７とは電気的に絶縁された状態となっており放電
等の問題や、塵、ホコリ等による経時的な絶縁性能の劣
化は生じない。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the first solution of the present invention. In the figure, 1 is a funnel, 1a is a neck part, 1b is a cone part, 1c is a funnel body part, 1d is a high-voltage anode button, 2 is a face panel, 3 is an electron gun, 4 is an explosion-proof band, 4a is a mounting ear part, Reference numeral 5 is a silicon resin film, 6 is a conductive film for adding capacitance, 7 is a deflection yoke, and 28 is a tube axis. These are the same as those of the conventional cathode ray tube device shown in FIG. Reference numeral 17 is a conductive film for electric field shielding. The conductive film 17 is provided by applying graphite from the cone portion 1b to the outer surface of the neck portion 1a, and is formed in a predetermined area that covers the opening of the deflection yoke 7. The conductive film 17 is connected to the conductive film 6 for adding capacitance, and is grounded by the ground wire 29 through the explosion-proof band 4 to form an electric field shield surface. The gap between the conductive film 17 and the deflection yoke 7 is filled with a natural hardening resin 30 for electrical insulation. Next, the operation will be described. In the cathode ray tube thus configured, the conductive film 17 becomes an equipotential surface of OV by grounding the explosion-proof band 4, and has an electric field shield effect against an alternating electric field that travels forward from the deflection yoke 7. Thus, the alternating electric field generated from the deflection yoke 7 is attenuated by the conductive film 17. Further, since the natural curable resin is filled between the horizontal deflection coil 7a of the deflection yoke 7 and the conductive film 17, the horizontal deflection coil 7a and the conductive film 17 are electrically insulated from each other and are discharged. And the like, and deterioration of the insulation performance due to dust, dust, etc. over time does not occur.
【００１１】図２は本発明の第二の解決手段の一実施例
を示す。図において、１はファンネル、１ａはネック
部、１ｂはコーン部、１ｃはファンネル本体部、１ｄは
高圧アノードボタン、２はフェースパネル、３は電子
銃、４は防爆バンド、４ａは取付け耳部、５はシリコン
樹脂膜、６は静電容量付加用導電膜、７は偏向ヨーク、
２１は透明導電膜、２９はアース線である。これらは図
１１に示す従来の別の陰極線管装置のものと同じであ
る。しかしこの発明ではフェースパネル２の外表面に設
けられた透明導電膜２１は防爆バンド４に接続されてア
ースされておらず、透明導電膜２１の一端は導線１２を
通じて直流電源１３ａに接続され、他端は導線１４を通
じて所定の値をもった抵抗１５を経て接地される。次に
動作について説明する。以上のように構成された陰極線
管装置では、フェースパネル２の外表面に設けた透明導
電膜２１に直流電源１３ａより電圧が加えられること
で、透明導電膜２１上に所望の等電位面を形成できる。
所望の電位は電源１３ａと抵抗１５とにより任意に設定
出来る。従来では透明導電膜２１は接地されていたた
め、零ボルトの均一電位にしか設定が出来なかった。こ
れに対し、本発明では偏向ヨーク７が発する交番電界の
強さ、交番周波数、及び陰極線管の動作状態などに応
じ、適切な電界シールド面を形成すべく、透明導電膜２
１に適切な電圧を印加することが出来る。FIG. 2 shows an embodiment of the second solving means of the present invention. In the figure, 1 is a funnel, 1a is a neck part, 1b is a cone part, 1c is a funnel body part, 1d is a high-voltage anode button, 2 is a face panel, 3 is an electron gun, 4 is an explosion-proof band, 4a is a mounting ear part, 5 is a silicon resin film, 6 is a conductive film for adding capacitance, 7 is a deflection yoke,
Reference numeral 21 is a transparent conductive film, and 29 is a ground wire. These are the same as those of another conventional cathode ray tube device shown in FIG. However, in the present invention, the transparent conductive film 21 provided on the outer surface of the face panel 2 is connected to the explosion-proof band 4 and is not grounded, and one end of the transparent conductive film 21 is connected to the DC power supply 13a through the conductor 12, The end is grounded through a conductor 14 through a resistor 15 having a predetermined value. Next, the operation will be described. In the cathode ray tube device configured as described above, a desired equipotential surface is formed on the transparent conductive film 21 by applying a voltage to the transparent conductive film 21 provided on the outer surface of the face panel 2 from the DC power supply 13a. it can.
The desired potential can be set arbitrarily by the power supply 13a and the resistor 15. Conventionally, the transparent conductive film 21 was grounded, so that it could only be set to a uniform potential of zero volt. On the other hand, in the present invention, the transparent conductive film 2 is formed so as to form an appropriate electric field shield surface according to the strength of the alternating electric field generated by the deflection yoke 7, the alternating frequency, the operating state of the cathode ray tube, and the like.
It is possible to apply an appropriate voltage to 1.
【００１２】図３は本発明の第二の解決手段の別の実施
例を示す。これは図２の直流電源１３ａに代えて交流電
源１３ｂを用いて透明導電膜２１に交番電位を付与する
ようになしたものである。この交番電位は図４の(b) に
示すようなものである。これは図４の(a) に示す偏向ヨ
ーク７が発する交番電界に対して逆位相になされてい
る。従ってこのような交番電位を付与された透明導電膜
２１は偏向ヨーク７からの交番電界を効率よくシールド
する。FIG. 3 shows another embodiment of the second solution of the present invention. This is one in which an AC power source 13b is used instead of the DC power source 13a in FIG. 2 to apply an alternating potential to the transparent conductive film 21. This alternating potential is as shown in FIG. 4 (b). This is in anti-phase with the alternating electric field generated by the deflection yoke 7 shown in FIG. Therefore, the transparent conductive film 21 to which such an alternating potential is applied efficiently shields the alternating electric field from the deflection yoke 7.
【００１３】図５は本発明の第三解決手段の一実施例を
示す。図において、１はファンネル、１ａはネック部、
１ｂはコーン部、１ｃはファンネル本体部、１ｄは高圧
アノードボタン、２はフェースパネル、３は電子銃、４
は防爆バンド、４ａは取付け耳部、５はシリコン樹脂
膜、６は静電容量付加用導電膜、７は偏向ヨーク、１８
は導通テープ、２９はアース線である。これらは図１１
に示すものと同じである。１７は第一の電界シールド面
を形成するために、導電膜６と電気的に接続するように
コーン部１ｂからネック部１ａにかけての所定区域に黒
鉛を塗布して設けられた第一の電界シールド用の導電膜
であり、偏向ヨークの開口部全面を覆うような形に形成
される。１０は漏斗状絶縁シートであり、導電膜１７と
偏向ヨーク７のコイル部とを電気的に絶縁するために、
導電膜１７の上に覆せられる。偏向ヨーク７はこの漏斗
状絶縁シート１０を介してファンネル１に取り付けられ
る。２１はフェースパネルの全面に酸化インジウムの微
粒子をフイラーとする塗料を塗布して設けられた第二の
電界シールド用の透明導電膜である。この透明導電膜２
１は導通テープ１８によって防爆バンド４へ接続されア
ース線２９により接地される。前記導電膜１７も静電容
量付加用導電膜６を介してアース線２９によりアースさ
れる。次に動作について説明する。このようにして構成
された陰極線管装置において、防爆バンド４をアースす
ることによって、透明導電膜２１及び導電膜１７はＯＶ
の等導電位面となり、偏向ヨーク７の前面領域とフェー
スパネル２の表面とに電界シールド効果を持つ面がそれ
ぞれ形成される。偏向ヨーク７から発する交番電界はフ
ァンネル１に形成された第一の電界シールド面によって
減衰され、さらにフェースパネルに形成された第二の電
界シールド面によって減衰される。また偏向ヨーク７の
水平偏向コイル７ａと導電膜１７との間には絶縁シート
１０を介在させているので、水平偏向コイル７ａと導電
膜１７とは電気的に絶縁された状態となっており放電等
の問題は生じない。このように本実施例によれば偏向ヨ
ーク７から発せられる交番電界はファンネル１とフェー
スパネル２に形成された多段の電界シールドの相乗効果
により、ファンネル１を透過してフェースパネル２より
放射される交番電界は、発明者自身の測定によれば、表
３に示すとおり、未対策ＣＲＴに比べ１／１０以下に低
減することができた。 FIG. 5 shows an embodiment of the third solving means of the present invention. In the figure, 1 is a funnel, 1a is a neck portion,
1b is a cone part, 1c is a funnel body part, 1d is a high voltage anode button, 2 is a face panel, 3 is an electron gun, 4
Is an explosion-proof band, 4a is a mounting ear, 5 is a silicon resin film, 6 is a conductive film for adding capacitance, 7 is a deflection yoke, 18
Is a conductive tape and 29 is a ground wire. These are shown in FIG.
Is the same as that shown in. Reference numeral 17 denotes a first electric field shield formed by applying graphite to a predetermined area from the cone portion 1b to the neck portion 1a so as to electrically connect to the conductive film 6 to form a first electric field shield surface. And a conductive film for use in the deflection yoke, and is formed in such a shape as to cover the entire opening of the deflection yoke. Reference numeral 10 denotes a funnel-shaped insulating sheet, which electrically insulates the conductive film 17 and the coil portion of the deflection yoke 7 from each other.
It is covered on the conductive film 17. The deflection yoke 7 is attached to the funnel 1 via the funnel-shaped insulating sheet 10. Reference numeral 21 is a transparent conductive film for a second electric field shield, which is provided by applying a paint containing fine particles of indium oxide as a filler on the entire surface of the face panel. This transparent conductive film 2
1 is connected to the explosion-proof band 4 by a conductive tape 18 and grounded by a ground wire 29. The conductive film 17 is also grounded by the ground wire 29 via the conductive film 6 for adding capacitance. Next, the operation will be described. In the cathode ray tube device configured as described above, the transparent conductive film 21 and the conductive film 17 are OV by grounding the explosion-proof band 4.
And the surfaces having the electric field shielding effect are formed on the front surface region of the deflection yoke 7 and the surface of the face panel 2, respectively. The alternating electric field generated from the deflection yoke 7 is attenuated by the first electric field shield surface formed on the funnel 1 and further attenuated by the second electric field shield surface formed on the face panel. Further, since the insulating sheet 10 is interposed between the horizontal deflection coil 7a of the deflection yoke 7 and the conductive film 17, the horizontal deflection coil 7a and the conductive film 17 are electrically insulated from each other, and the discharge is performed. There is no problem. As described above, according to this embodiment, the alternating electric field generated from the deflection yoke 7 is transmitted through the funnel 1 and radiated from the face panel 2 due to the synergistic effect of the multi-stage electric field shield formed on the funnel 1 and the face panel 2. According to the measurement by the inventor himself, as shown in Table 3, the alternating electric field could be reduced to 1/10 or less as compared with the untreated CRT.
【００１４】図６および図７は本発明の第三の解決手段
の別の実施例を示す。この実施例ではファンネル１のネ
ック部１ａとコーン部１ｂの継ぎ目であるネックシール
ライン１ｅの部分を避けてコーン部１ｂの所定箇所のみ
に導電膜を形成したものである。すなわち図７について
詳述すると、１７は電界シールド面を形成するために設
けられた導電膜であり、該導電膜１７は黒鉛を塗布した
ものであり、偏向ヨーク７の水平偏向コイル７ａの最大
径７ｄよりも少なくとも大きな径を持つファンネル外表
面上の円周とネックシールライン１ｅから管軸２８方向
で少なくとも５ｍｍ、フェースパネル２寄りのファンネ
ル外表面上の円周とによって囲まれる領域に形成される
ものである。また、導電膜１７は、導通テープ１８によ
って導電膜６に電気的に接続されている。漏斗状の絶縁
シート１０が上記導電膜１７を完全に覆うような形、大
きさに設計され、図６に示すように、偏向ヨーク７と導
電膜１７との間に介在させる。その上に偏向ヨーク７が
取りつけられる。なお、図７における偏向ヨーク７の水
平偏向コイル７ａの最大径７ｄとは、図１０に示す水平
偏向コイル７ａをＸ−Ｙ平面で切った時の断面における
コイル最大径を指すものである。従って、コイルのＸ−
Ｙ断面が楕円であれば、その楕円の長径を指すこととな
る。次に動作について説明する。このようにして構成さ
れた陰極線管装置において、防爆バンド４をアースする
ことによって、透明導電膜２１及び導電膜１７はＯＶの
等導電位面となり、偏向ヨーク７の前面領域とフェース
パネル２の表面とに電界シールド効果を持つ面が形成さ
れる。偏向ヨーク７から発する交番電界はファンネル１
に形成された第一の電界シールド面によって減衰され、
さらにフェースパネルに形成された第二の電界シールド
面によって減衰される。また偏向ヨーク７の水平偏向コ
イル７ａと導電膜１７との間には絶縁シート１０を介在
させているので、水平偏向コイル７ａと導電膜１７とは
電気的に絶縁された状態となっており放電等の問題は生
じない。このように本実施例によれば偏向ヨーク７から
発せられる交番電界はファンネル部とフェースパネル部
に形成された多段の電界シールドの相乗効果により、フ
ァンネル部を透過してフェースパネル部より放射される
交番電界は未対策ＣＲＴに比べ１／１０に低減すること
ができた。また、導電膜１７の端部、つまりフェースパ
ネル側は少なくとも偏向ヨーク７の水平偏向コイル７ａ
の最大径７ｄよりも少なくとも大きな円周となっている
ので、偏向ヨーク７より放射される交番電界を十分にシ
ールドできる電界シールド面を形成することができる。
また、導電膜１７はネックシールライン１ｅから管軸２
８方向で少なくとも５ｍｍ、フェースパネル２寄りのと
ころまでに形成されているので、ネックシールライン１
ｅは電気抵抗の高い状態に保たれる作用がある。6 and 7 show another embodiment of the third solution of the present invention. In this embodiment, the conductive film is formed only on a predetermined portion of the cone portion 1b while avoiding the portion of the neck seal line 1e which is a joint between the neck portion 1a of the funnel 1 and the cone portion 1b. That is, referring to FIG. 7 in detail, 17 is a conductive film provided to form an electric field shield surface, the conductive film 17 is coated with graphite, and the maximum diameter of the horizontal deflection coil 7 a of the deflection yoke 7 is large. It is formed in a region surrounded by a circumference on the outer surface of the funnel having a diameter at least larger than 7d and at least 5 mm in the direction of the tube axis 28 from the neck seal line 1e, near the face panel 2 on the outer surface of the funnel. It is a thing. Further, the conductive film 17 is electrically connected to the conductive film 6 by the conductive tape 18. The funnel-shaped insulating sheet 10 is designed in a shape and size so as to completely cover the conductive film 17, and is interposed between the deflection yoke 7 and the conductive film 17, as shown in FIG. The deflection yoke 7 is mounted on it. The maximum diameter 7d of the horizontal deflection coil 7a of the deflection yoke 7 in FIG. 7 refers to the maximum coil diameter in the cross section when the horizontal deflection coil 7a shown in FIG. 10 is cut along the XY plane. Therefore, the X-
If the Y cross section is an ellipse, it means the major axis of the ellipse. Next, the operation will be described. In the thus configured cathode ray tube device, by grounding the explosion-proof band 4, the transparent conductive film 21 and the conductive film 17 become the equipotential surface of OV, and the front area of the deflection yoke 7 and the surface of the face panel 2. A surface having an electric field shielding effect is formed on and. The alternating electric field generated from the deflection yoke 7 is the funnel 1.
Is attenuated by the first electric field shield surface formed on
Further, it is attenuated by the second electric field shield surface formed on the face panel. Further, since the insulating sheet 10 is interposed between the horizontal deflection coil 7a of the deflection yoke 7 and the conductive film 17, the horizontal deflection coil 7a and the conductive film 17 are electrically insulated from each other, and the discharge is performed. There is no problem. As described above, according to this embodiment, the alternating electric field generated from the deflection yoke 7 is transmitted through the funnel portion and radiated from the face panel portion due to the synergistic effect of the multi-stage electric field shield formed in the funnel portion and the face panel portion. The alternating electric field could be reduced to 1/10 of that of the unmeasured CRT. At least the horizontal deflection coil 7a of the deflection yoke 7 is provided at the end of the conductive film 17, that is, on the face panel side.
Since the circumference is at least larger than the maximum diameter 7d, it is possible to form an electric field shield surface capable of sufficiently shielding the alternating electric field emitted from the deflection yoke 7.
Further, the conductive film 17 extends from the neck seal line 1e to the tube shaft 2
Since it is formed at least 5 mm in 8 directions and near the face panel 2, the neck seal line 1
e has a function of keeping a high electric resistance.
【００１５】[0015]
【発明の効果】本発明の第一の解決手段では偏向ヨーク
から発出された交番電界は発散する間もなくファンネル
に設けた電界シールド用導電膜で遮蔽されると共に、自
然硬化樹脂の充填で絶縁性能が長期的に十分に維持され
るという効果がある。本発明の第二の解決手段ではフェ
ースパネル表面上の電界シールド用の透明導電膜が適切
な電位を付与されるので良好なシールド効果が達成でき
るという効果がある。本発明の第三の解決手段では偏向
ヨークから発出された交番電界はファンネル部とフェー
スパネル部に形成された多段の電界シールドの相乗効果
により十分なシールド効果が達成されるという効果があ
る。According to the first solution of the present invention, the alternating electric field emitted from the deflection yoke is shielded by the electric field shielding conductive film provided in the funnel immediately before diverging, and the insulating performance is improved by filling with the natural curing resin. It has the effect of being sufficiently maintained in the long term. According to the second solution of the present invention, the transparent conductive film for electric field shield on the surface of the face panel is given an appropriate electric potential, so that an excellent shield effect can be achieved. The third solution of the present invention has an effect that the alternating electric field generated from the deflection yoke achieves a sufficient shielding effect by the synergistic effect of the multi-stage electric field shields formed in the funnel portion and the face panel portion.
【図１】本発明の第一の解決手段による陰極線管装置の
構成図である。FIG. 1 is a configuration diagram of a cathode ray tube device according to a first solving means of the present invention.
【図２】本発明の第二の解決手段による陰極線管装置の
構成図である。FIG. 2 is a configuration diagram of a cathode ray tube device according to a second solving means of the present invention.
【図３】本発明の第二の解決手段による別の態様の陰極
線管装置の構成図である。FIG. 3 is a configuration diagram of a cathode ray tube device according to another aspect of the second solving means of the present invention.
【図４】図３の陰極線管装置の電界シールド用透明導電
膜に印加する逆位相の交番電圧を説明する図である。FIG. 4 is a diagram for explaining an alternating voltage of opposite phase applied to the transparent conductive film for electric field shield of the cathode ray tube device of FIG.
【図５】本発明の第三の解決手段による陰極線管装置の
構成図である。FIG. 5 is a configuration diagram of a cathode ray tube device according to a third solving means of the present invention.
【図６】本発明の第三の解決手段による別の態様の陰極
線管装置の構成図である。FIG. 6 is a configuration diagram of another embodiment of the cathode ray tube device according to the third solving means of the present invention.
【図７】図６の陰極線管装置の本体部を示す図である。7 is a diagram showing a main body of the cathode ray tube device of FIG.
【図８】従来の陰極線管装置の構成図である。FIG. 8 is a configuration diagram of a conventional cathode ray tube device.
【図９】図８の陰極線管装置の本体部を示す図である。9 is a diagram showing a main body of the cathode ray tube device of FIG.
【図１０】図８の陰極線管装置に取りつける偏向ヨーク
を示す拡大斜視図である。10 is an enlarged perspective view showing a deflection yoke attached to the cathode ray tube device of FIG.
【図１１】従来の別の態様の陰極線管装置の構成図であ
る。FIG. 11 is a configuration diagram of another conventional cathode ray tube device.
１ ファンネル １ａ ネック部 １ｂ コーン部 １ｃ ファンネル本体部 １ｄ アノードボタン １ｅ ネックシールライン ２ フェースパネル ３ 電子銃 ４ 防爆バンド ５ シリコン樹脂 ６ 導電膜 ７ 偏向ヨーク ７ａ 水平偏向コイル ７ｂ 垂直偏向コイル ７ｃ 偏向ヨークの本体部 ７ｄ 偏向ヨークの水平コイルの最大径 １７ 電界シールド用の導電膜 １０ 漏斗状絶縁シート １８ 導通テープ ２０ ガラスバルブ ２１ 電界シールド用の透明導電膜 ２８ 管軸線 ２９ アース線 ３０ 自然硬化樹脂 1 Funnel 1a Neck part 1b Cone part 1c Funnel body part 1d Anode button 1e Neck seal line 2 Face panel 3 Electron gun 4 Explosion-proof band 5 Silicon resin 6 Conductive film 7 Deflection yoke 7a Horizontal deflection coil 7b Vertical deflection coil 7c Deflection yoke body Part 7d Maximum diameter of horizontal coil of deflection yoke 17 Conductive film for electric field shield 10 Funnel-shaped insulating sheet 18 Conductive tape 20 Glass bulb 21 Transparent conductive film for electric field shield 28 Tube axis 29 Earth wire 30 Natural curing resin
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山口 哲也 長岡京市馬場図所１番地 三菱エンジニア リング株式会社京都事業所内 (72)発明者 滝沢 智紀 長岡京市馬場図所１番地 三菱電機株式会 社京都製作所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tetsuya Yamaguchi No. 1 Baba Institute, Nagaokakyo City Mitsubishi Engineering Co., Ltd. Kyoto office (72) Inventor Tomonori Takizawa No. 1 Baba Institute, Nagaokakyo Mitsubishi Electric Corporation Kyoto Works Within
Claims (3)
側面の一部に静電容量付加用導電膜が設けられたファン
ネル本体部、及び上記ネック部とファンネル本体部とを
つなぐコーン部から構成されるファンネルと、内側面に
蛍光体膜を有し上記ファンネル本体部の上記コーン部と
つながる側とは反対側の一端に配置されるフェースパネ
ルと、上記ファンネルに上記コーン部からネック部にか
けて嵌装され上記電子銃から出射された電子ビームを偏
向する偏向ヨークとを有する陰極線管装置において、 上記ファンネルの上記偏向ヨークが嵌装されるコーン部
からネック部にかけての所定領域に電界シールド用導電
膜を設け、この導電膜に対して前記偏向ヨークのコイル
を電気絶縁するために前記導電膜と前記偏向ヨークとの
隙間に自然硬化樹脂を充填したことを特徴とする陰極線
管装置。1. A neck portion in which an electron gun is sealed, a funnel main body portion having a conductive film for adding capacitance on a part of its outer surface, and a cone connecting the neck portion and the funnel main body portion. And a face panel having a phosphor film on the inner surface and arranged at one end of the funnel body opposite to the side connected to the cone portion, and the funnel to the neck from the cone portion. And a deflection yoke for deflecting an electron beam emitted from the electron gun. A conductive film is provided, and a natural curing resin is provided in the gap between the conductive film and the deflection yoke to electrically insulate the coil of the deflection yoke from the conductive film. Cathode ray tube apparatus characterized by filled.
側面の一部に静電容量付加用導電膜が設けられたファン
ネル本体部、及び上記ネック部とファンネル本体部とを
つなぐコーン部から構成されるファンネルと、内側面に
蛍光体膜を有し上記ファンネル本体部の上記コーン部と
つながる側とは反対側の一端に配置されるフェースパネ
ルと、上記ファンネルに上記コーン部からネック部にか
けて嵌装され上記電子銃から出射された電子ビームを偏
向する偏向ヨークと、前記フェースパネル外表面に設け
られた透明導電膜とを有する陰極線管装置において、 前記フェースパネル外表面に設けられた前記透明導電膜
に偏向ヨークからの交番電界をシールドするのに最適な
電位を付加する装置を具備したことを特徴とする陰極線
管装置。2. A neck portion in which an electron gun is sealed, a funnel body portion having a conductive film for adding capacitance on a part of its outer surface, and a cone connecting the neck portion and the funnel body portion. And a face panel having a phosphor film on the inner surface and arranged at one end of the funnel body opposite to the side connected to the cone portion, and the funnel to the neck from the cone portion. In a cathode ray tube device having a deflection yoke fitted over a portion to deflect an electron beam emitted from the electron gun, and a transparent conductive film provided on the outer surface of the face panel, the cathode ray tube device being provided on the outer surface of the face panel. A cathode ray tube device comprising: a device for applying an optimum electric potential to the transparent conductive film for shielding an alternating electric field from a deflection yoke.
側面の一部に静電容量付加用導電膜が設けられたファン
ネル本体部、及び上記ネック部とファンネル本体部とを
つなぐコーン部から構成されるファンネルと、内側面に
蛍光体膜を有し上記ファンネル本体部の上記コーン部と
つながる側とは反対側の一端に配置されるフェースパネ
ルと、上記ファンネルに上記コーン部からネック部にか
けて嵌装され上記電子銃から出射された電子ビームを偏
向する偏向ヨークとを有する陰極線管装置において、 上記ファンネルの上記偏向ヨークが嵌装されるコーン部
からネック部にかけての所定領域に第一の電界シールド
用の導電膜を設け、上記フェースパネルの外表面に第二
の電界シールド用の透明導電膜を設けたことを特徴とす
る陰極線管装置。3. A neck portion in which an electron gun is sealed, a funnel body portion in which a conductive film for adding capacitance is provided on a part of an outer surface, and a cone connecting the neck portion and the funnel body portion. And a face panel having a phosphor film on the inner surface and arranged at one end of the funnel body opposite to the side connected to the cone portion, and the funnel to the neck from the cone portion. In a cathode ray tube device having a deflection yoke which is fitted over a portion to deflect an electron beam emitted from the electron gun, a first portion is provided in a predetermined region from a cone portion where the deflection yoke of the funnel is fitted to a neck portion. 2. A cathode ray tube device, comprising: a conductive film for shielding an electric field, and a transparent conductive film for shielding a second electric field provided on an outer surface of the face panel.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24041692A JP3180461B2 (en) | 1992-09-09 | 1992-09-09 | Cathode ray tube device |
| KR1019930017351A KR970003234B1 (en) | 1992-09-09 | 1993-09-01 | Cathode ray tube |
| US08/123,154 US5451840A (en) | 1992-09-09 | 1993-09-07 | Cathode-ray tube providing protection from alternating electric fields |
| DE4330952A DE4330952C2 (en) | 1992-09-09 | 1993-09-08 | Cathode ray tube assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24041692A JP3180461B2 (en) | 1992-09-09 | 1992-09-09 | Cathode ray tube device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0689673A true JPH0689673A (en) | 1994-03-29 |
| JP3180461B2 JP3180461B2 (en) | 2001-06-25 |
Family
ID=17059154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24041692A Expired - Fee Related JP3180461B2 (en) | 1992-09-09 | 1992-09-09 | Cathode ray tube device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5451840A (en) |
| JP (1) | JP3180461B2 (en) |
| KR (1) | KR970003234B1 (en) |
| DE (1) | DE4330952C2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09153334A (en) * | 1995-11-29 | 1997-06-10 | Mitsubishi Electric Corp | Cathode-ray tube device and manufacture thereof |
| EP0785566A1 (en) * | 1996-01-19 | 1997-07-23 | Capetronic (Kaohsiung) Corp. | Low varying electric field and radiation CRT |
| JPH1092344A (en) * | 1996-07-25 | 1998-04-10 | Toshiba Corp | Cathode ray tube and cathode ray tube device |
| JP2000156183A (en) * | 1998-06-29 | 2000-06-06 | Samsung Sdi Co Ltd | Display system provided with negative ion generating means |
| KR100274883B1 (en) * | 1999-03-19 | 2000-12-15 | 김순택 | Cathode ray tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4411922Y1 (en) * | 1966-09-06 | 1969-05-19 | ||
| JPH0282434A (en) * | 1988-09-19 | 1990-03-23 | Hitachi Ltd | Cathode-ray tube |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE526555A (en) * | 1953-02-20 | |||
| US4217521A (en) * | 1977-12-21 | 1980-08-12 | Zenith Radio Corporation | High potential static discharge means for television cathode ray tubes |
| JPS61101950A (en) * | 1984-10-23 | 1986-05-20 | Shin Kobe Electric Mach Co Ltd | Lead storage battery |
| US4786973A (en) * | 1987-08-19 | 1988-11-22 | Rca Licensing Corporation | Mounting sleeve for video apparatus deflection yoke |
| US4853601A (en) * | 1987-11-02 | 1989-08-01 | Tektronix, Inc. | Multiple beam electron discharge tube having bipotential acceleration and convergence electrode structure |
| US4916358A (en) * | 1988-10-25 | 1990-04-10 | Rca Licensing Corporation | Kinescope grounding system |
| JPH03131180A (en) * | 1989-10-16 | 1991-06-04 | Fujitsu Ltd | Cathode ray tube display device |
| CA2041089C (en) * | 1990-05-10 | 1995-01-17 | Yasuo Iwasaki | Coating film for the faceplate of a colour cathode ray tube |
| EP0500349B1 (en) * | 1991-02-20 | 1996-01-03 | Nanao Corporation | Apparatus for suppressing field radiation from display device |
| JPH0513981A (en) * | 1991-06-28 | 1993-01-22 | Mitsubishi Electric Corp | Cathode ray tube display device |
| DE4123565C1 (en) * | 1991-07-16 | 1992-09-17 | Tandberg Data A/S, Oslo, No |
-
1992
- 1992-09-09 JP JP24041692A patent/JP3180461B2/en not_active Expired - Fee Related
-
1993
- 1993-09-01 KR KR1019930017351A patent/KR970003234B1/en not_active IP Right Cessation
- 1993-09-07 US US08/123,154 patent/US5451840A/en not_active Expired - Lifetime
- 1993-09-08 DE DE4330952A patent/DE4330952C2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4411922Y1 (en) * | 1966-09-06 | 1969-05-19 | ||
| JPH0282434A (en) * | 1988-09-19 | 1990-03-23 | Hitachi Ltd | Cathode-ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3180461B2 (en) | 2001-06-25 |
| KR970003234B1 (en) | 1997-03-15 |
| US5451840A (en) | 1995-09-19 |
| DE4330952A1 (en) | 1994-03-10 |
| KR940007955A (en) | 1994-04-28 |
| DE4330952C2 (en) | 2002-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |